| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 805.55 | USD | 20251201 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 847.59 | USD | 20251129 |
| Qingdao Shengze Chemical Co., Ltd. | Industrial Grade | MT | 847.59 | USD | 20251129 |
| Qingdao Shengze Chemical Co., Ltd. | Industrial Grade | MT | 847.59 | USD | 20251128 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 847.59 | USD | 20251128 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 847.71 | USD | 20251127 |
| Qingdao Shengze Chemical Co., Ltd. | Industrial Grade | MT | 847.71 | USD | 20251127 |
| Qingdao Shengze Chemical Co., Ltd. | Industrial Grade | MT | 847.51 | USD | 20251126 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 847.51 | USD | 20251126 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 847.15 | USD | 20251125 |